So I had a vacuum leak I could hear and couldn’t find so for a smoke test I went.

Fixed the vac leak had a small spilt vacuum line after fixing it was repressurised with smoke and that was sorted but there was smoke not gushing out but enough coming out where the oil filler neck joins the engine - is this common? Is there a place this leaks and any idea how to get it off and fix?

Cheers Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF